add authorization policies

Introduce first-class policy helpers and composition through middleware

Normalize chat context for more updates and add regression coverage

Document the completed backlog item in changelog, TODO, and wiki

bot_config.go

@@ -0,0 +1,203 @@
+package laniakea
+
+import (
+	"fmt"
+	"slices"
+
+	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
+	"git.scuroneko.dev/scuroneko/slog"
+)
+
+// AddPrefixes adds one or more command prefixes (e.g., "/", "!").
+// Must have at least one prefix before Run().
+func (bot *Bot[T]) AddPrefixes(prefixes ...string) *Bot[T] {
+	if !bot.configMutable("AddPrefixes") {
+		return bot
+	}
+	bot.prefixes = append(bot.prefixes, prefixes...)
+	return bot
+}
+
+// SetDraftProvider replaces the default DraftProvider with a custom one.
+// Useful for using LinearDraftIdGenerator to persist draft IDs across restarts.
+func (bot *Bot[T]) SetDraftProvider(p *DraftProvider) *Bot[T] {
+	if !bot.configMutable("SetDraftProvider") {
+		return bot
+	}
+	bot.draftProvider = p
+	return bot
+}
+
+// GetDraftProvider returns the draft provider currently used by the bot.
+func (bot *Bot[T]) GetDraftProvider() *DraftProvider {
+	return bot.draftProvider
+}
+
+// SetSessionStore replaces the session store used for scene management.
+func (bot *Bot[T]) SetSessionStore(store SessionStore) *Bot[T] {
+	if !bot.configMutable("SetSessionStore") {
+		return bot
+	}
+	if store == nil {
+		bot.logger.Warn("SetSessionStore called with nil store; using default MemorySessionStore")
+		return bot
+	}
+	bot.sessionStore = store
+	return bot
+}
+
+// GetSessionStore returns the session store used for scene management.
+func (bot *Bot[T]) GetSessionStore() SessionStore {
+	return bot.sessionStore
+}
+
+// SetSceneScopePriority sets the lookup order for resolving active scene sessions.
+func (bot *Bot[T]) SetSceneScopePriority(priority []SceneScope) *Bot[T] {
+	if !bot.configMutable("SetSceneScopePriority") {
+		return bot
+	}
+	newPriority := make([]SceneScope, 0, 3)
+	for _, scope := range priority {
+		if scope != SceneScopeUser && scope != SceneScopeChat && scope != SceneScopeUserChat {
+			bot.logger.Warnln(fmt.Sprintf("invalid scene scope %v in priority list; ignoring", scope))
+			continue
+		}
+		if slices.Index(newPriority, scope) >= 0 {
+			bot.logger.Warnln(fmt.Sprintf("duplicate scope %v in scene scope priority; ignoring duplicates", scope))
+			continue
+		}
+		newPriority = append(newPriority, scope)
+	}
+	if len(newPriority) == 0 || len(newPriority) > 3 {
+		bot.logger.Warnln("scene scope priority must have 1 to 3 scopes; ignoring invalid input")
+		return bot
+	}
+	bot.sceneScopePriority = append([]SceneScope(nil), newPriority...)
+	return bot
+}
+
+// SetAppData injects shared application data into the bot.
+//
+// The data is accessible to commands, payload handlers, middleware, scenes,
+// and runners through the generic type parameter T.
+//
+// For shared dependencies such as *sql.DB, prefer using a pointer type as T.
+// Value-typed application data is supported, but the bot warns once because
+// handlers receive T by value.
+func (bot *Bot[T]) SetAppData(ctx T) *Bot[T] {
+	if !bot.configMutable("SetAppData") {
+		return bot
+	}
+	if !bot.warnedValueData && shouldWarnOnValueAppData[T]() && bot.logger != nil {
+		bot.logger.Warnln("app data uses a value type; shared dependencies should usually use a pointer type as T")
+		bot.warnedValueData = true
+	}
+	bot.appData = ctx
+	bot.hasAppData = true
+	return bot
+}
+
+// GetAppData returns the injected application data.
+// If SetAppData was not called, it returns the zero value of T.
+func (bot *Bot[T]) GetAppData() T { return bot.appData }
+
+// SetUpdateTypes sets the list of update types the bot will request from Telegram.
+// Overwrites any previously set types.
+func (bot *Bot[T]) SetUpdateTypes(t ...tgapi.UpdateType) *Bot[T] {
+	if !bot.configMutable("UpdateTypes") {
+		return bot
+	}
+	bot.updateTypes = make([]tgapi.UpdateType, 0)
+	bot.updateTypes = append(bot.updateTypes, t...)
+	return bot
+}
+
+// AddUpdateType adds one or more update types to the list.
+// Does not overwrite existing types.
+func (bot *Bot[T]) AddUpdateType(t ...tgapi.UpdateType) *Bot[T] {
+	if !bot.configMutable("AddUpdateType") {
+		return bot
+	}
+	bot.updateTypes = append(bot.updateTypes, t...)
+	return bot
+}
+
+// GetUpdateTypes returns the list of update types the bot is configured to receive.
+func (bot *Bot[T]) GetUpdateTypes() []tgapi.UpdateType {
+	return append([]tgapi.UpdateType(nil), bot.updateTypes...)
+}
+
+// SetPayloadType sets the default payload encoding type used for callback data.
+// JSON stores payload as a string: `{"cmd":"command","args":[...]}`.
+// Base64 stores the same JSON encoded as a Base64URL string.
+// InlineKeyboard.SetPayloadType may override this value for an individual keyboard.
+func (bot *Bot[T]) SetPayloadType(t BotPayloadType) *Bot[T] {
+	if !bot.configMutable("SetPayloadType") {
+		return bot
+	}
+	bot.payloadType = t
+	return bot
+}
+
+// GetPayloadType returns the bot's default callback payload encoding type.
+func (bot *Bot[T]) GetPayloadType() BotPayloadType { return bot.payloadType }
+
+// SetStrictPayloadType enables or disables strict callback payload decoding.
+// When enabled, callback payloads must match the bot's default payload type.
+func (bot *Bot[T]) SetStrictPayloadType(strict bool) *Bot[T] {
+	if !bot.configMutable("SetStrictPayloadType") {
+		return bot
+	}
+	bot.strictPayloadType = strict
+	return bot
+}
+
+// SetErrorTemplate sets the format string for error messages sent to users.
+// Use "%s" to insert the error message.
+// Example: "❌ Error: %s" → "❌ Error: Command not found".
+func (bot *Bot[T]) SetErrorTemplate(s string) *Bot[T] {
+	if !bot.configMutable("ErrorTemplate") {
+		return bot
+	}
+	bot.errorTemplate = s
+	return bot
+}
+
+// SetDebug enables or disables debug logging.
+func (bot *Bot[T]) SetDebug(debug bool) *Bot[T] {
+	bot.debug = debug
+	level := slog.FATAL
+	if debug {
+		level = slog.DEBUG
+	}
+
+	bot.logger.Level(level)
+	if bot.RequestLogger != nil {
+		bot.RequestLogger.Level(level)
+	}
+	for _, p := range bot.plugins {
+		if p.logger == nil {
+			continue
+		}
+		p.logger.Level(level)
+	}
+	return bot
+}
+
+// SetL10n sets the localization (i18n) provider for the bot.
+//
+// The L10n instance must be pre-populated with translations.
+// Translations are accessed via Bot.L10n(lang, key).
+//
+// Replaces any previously set L10n instance.
+func (bot *Bot[T]) SetL10n(l *L10n) *Bot[T] {
+	if !bot.configMutable("SetL10n") {
+		return bot
+	}
+	if l == nil {
+		bot.logger.Warn("SetL10n called with nil L10n; localization will be disabled")
+		return bot
+	}
+	bot.l10n = l
+	return bot
+}